210_Dialog和AlertDialog各种情况调试

210_Dialog和AlertDialog各种情况调试

Dialog和AlertDialog有很多的不同

然后不同的情况下又会有很多的不同

比如先show还是先setContentView

有时候出来的情况就不一样

我就把调试的结果全部总结了然后比较一下

先是Dialog的先填充还是直接给R.layout,还有getWindow再设置setContentView和直接设置

public voidopen1(View view) {
    View inflate = View.inflate(context, R.layout.dialog,null);
    Dialog dialog = newDialog(context);
    dialog.show();
    dialog.getWindow().setContentView(inflate);
}

public voidopen2(View view) {
    Dialog dialog = newDialog(context);
    dialog.show();
    dialog.setContentView(R.layout.dialog);
}

public voidopen3(View view) {
    Dialog dialog = newDialog(context);
    dialog.show();
    dialog.getWindow().setContentView(R.layout.dialog);
}

public voidopen4(View view) {
    View inflate = View.inflate(context, R.layout.dialog,null);
    Dialog dialog = newDialog(context);
    dialog.show();
    dialog.setContentView(inflate);
}

这里的4种情况是一样的,也就是说是否先填充是一样的

getWindow这里虽然是一样的,但是AlertDialog就不一样了

这里要搞清楚对dialog设置setContentView和对window设置setContentView的区别

下面是AlertDialog的setContentView的不同情况

public void open3(View view) {
    AlertDialog alertDialog = new AlertDialog.Builder(this).create();
    alertDialog.show();
    alertDialog.setContentView(R.layout.dialog);
}

public void open4(View view) {
    AlertDialog alertDialog = new AlertDialog.Builder(this).create();
    alertDialog.show();
    alertDialog.getWindow().setContentView(R.layout.dialog);
}

两个显示很像,但是第二个比第一个窗口要小一点

所以对AlertDialog设置和对window设置是有区别的

然后我们看看想设置AlertDialog占满屏幕的不同情况

我们的布局很简单,width给的是match,height给的是wrap

public voidopen1(View view) {
    View inflate = View.inflate(context, R.layout.dialog,null);
    AlertDialog alertDialog =newAlertDialog.Builder(this).create();
    alertDialog.show();
    alertDialog.setContentView(R.layout.dialog);
    WindowManager.LayoutParams attributes = alertDialog.getWindow().getAttributes();
    attributes.width= WindowManager.LayoutParams.MATCH_PARENT;
    alertDialog.getWindow().setAttributes(attributes);
}

public voidopen2(View view) {
    View inflate = View.inflate(context, R.layout.dialog,null);
    AlertDialog alertDialog =newAlertDialog.Builder(this).create();
    alertDialog.show();
    alertDialog.setContentView(inflate);
    WindowManager.LayoutParams attributes = alertDialog.getWindow().getAttributes();
    attributes.width= WindowManager.LayoutParams.MATCH_PARENT;
    alertDialog.getWindow().setAttributes(attributes);
}

public voidopen3(View view) {
    View inflate = View.inflate(context, R.layout.dialog,null);
    AlertDialog alertDialog =newAlertDialog.Builder(this).create();
    alertDialog.show();
    alertDialog.getWindow().setContentView(R.layout.dialog);
    WindowManager.LayoutParams attributes = alertDialog.getWindow().getAttributes();
    attributes.width= WindowManager.LayoutParams.MATCH_PARENT;
    alertDialog.getWindow().setAttributes(attributes);
}

public voidopen4(View view) {
    View inflate = View.inflate(context, R.layout.dialog,null);
    AlertDialog alertDialog =newAlertDialog.Builder(this).create();
    alertDialog.show();
    alertDialog.getWindow().setContentView(inflate);
    WindowManager.LayoutParams attributes = alertDialog.getWindow().getAttributes();
    attributes.width= WindowManager.LayoutParams.MATCH_PARENT;
    alertDialog.getWindow().setAttributes(attributes);
}

我们发现,本来给window设置setContentView,会比直接对dialog设置小一点,也就是窄一点

但是现在4个都一样宽了,也就是说match这个属性对window起作用了

另外一点就是这说明了AlertDialog最宽就是这么宽,和屏幕就是会有一段距离

所以如果想充满屏幕得想其他办法,光给match是不够的.

然后我们试着不同的情况去占满屏幕

public voidopen2(View view) {
    AlertDialog dialog =newAlertDialog.Builder(this).create();
    dialog.show();
    dialog.setContentView(R.layout.dialog);
    Window window = dialog.getWindow();
    window.setGravity(Gravity.BOTTOM);
    window.getDecorView().setPadding(0,0,0,0);
    WindowManager.LayoutParams lp = window.getAttributes();
    lp.width= WindowManager.LayoutParams.MATCH_PARENT;
    lp.height= WindowManager.LayoutParams.WRAP_CONTENT;
    window.setAttributes(lp);
}

public voidopen3(View view) {
    AlertDialog dialog =newAlertDialog.Builder(this).create();
    dialog.show();
    dialog.setContentView(R.layout.dialog);
    Window window = dialog.getWindow();
    window.setGravity(Gravity.BOTTOM);
    WindowManager.LayoutParams lp = window.getAttributes();
    lp.width= WindowManager.LayoutParams.MATCH_PARENT;
    lp.height= WindowManager.LayoutParams.WRAP_CONTENT;
    window.setAttributes(lp);
}

public voidopen4(View view) {
    AlertDialog dialog =newAlertDialog.Builder(this).create();
    dialog.show();
    dialog.setContentView(R.layout.dialog);
    Window window = dialog.getWindow();
    window.setGravity(Gravity.BOTTOM);
    window.getDecorView().setPadding(0,0,0,0);
}

我们发现第一个成功了,

第二个上下左右都还是和屏幕有一段距离

第三个左右的间距还存在,上下没有间距了.